Device for the tightening of form tie wires



Jan. 21, 1930.

A. R-UNDEN ET. AL

DEVICE FOR THE TIGHTENING OF FORM TIE WIRES Fil ed Aug. 31} 1927 Patented Jan. 21, 1930 UNETED STATES PATENT FFEE DEVICE FOR THE TIG-I-ITENING OF FORM TIE WIRES Application filed August 31, 1927.

The primary object of our invention consists in providing simple means for the tightening of form tie wires used in concrete con struction. The invention consists of a body member, a. shaft journaled within the body member, an engaging head removably secured to the inner end of the journal shaft for engaging with the tie wires to be tightened and having a handle disposed upon its outer end for imparting rotations to the journal and to the head, feet in step formation being disposed on the inner end of the body member adapted for engagement with the forms during the tightening process being imparted to the wires.

A further object of our invention consists in providin tightening device for the form wires, as used in concrete construction, wherein an engaging head is provided for engaging the ends of the tie wires and holding the same while a twist is being imparted to the wire so that the same may be easily disen gaged from-the tie wire after the same has been twisted.

A further object of our invention consists in pr viding means wherein a lateral movement is imparted to the journal and the head during the tightening of the form wires.

lVith these and incidental objects in view, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims, and a preferred form of embodiment of which is hereinafter shown with reference to the drawings Which accompany and form a part of this specification.

In the drawings:

Fig. 1 is a side elevation of our device, illustrating the same in position upon the form construction and engaging the tie wires of the forms.

Fig. 2 is an enlarged, fragmentary, view of the engaging head shown in engagement with the form of tie wires.

Fig. 3 is a side elevation, taken on line of Fig. 2, looking in the direction indicated.

Fig. 4 is an end view, taken on line 4r-4 of Fig. 2, looking in the direction indicated.

Serial No. 216,666.

Fig. 5 isa side elevation, partly in section, of another preferred form of embodiment of our device.

Fig. 6 is a side elevation of a second preferred embodiment of the engaging head.

Litre reference characters refer to like parts throughout the several views.

1 is the side wall of a concrete form around which tie wire 2 passes, having terminals 3 and 4:. e preferably make the body portion 5 of our device cylindrical in form, having a bracket fi'clisposed thereupon. The bracket 6 terminates in feet 7 and 8, either of which may be used depending upon the location of the side wall 1, and where the foot may be made to engage with the side wall 1. A spindle 9 passes through the body portion 5, and is journaled therein. The head 10 is secured to the inner end of the spindle and is removably placed thereupon; the pin 11 maintaining the engaging head 10 in fixed position upon the inner end of the spindle 9. It is desirable, in'the use of our device, during the attachment of the wires to be tightened to the head that rotation of the head be prevented during such engagin action. In order to accomplish this result, the spindle 9 is enlarged on its outer end as shown at 12 and is substantially the same diameter as that of the body portion 5. During the engagement of the tie wires with the head, the hand of theoperator of the device grasps the body portion 5 and the enlarged portion 12 of the spindle thus preventing the rotation of the spindle 12 during the engagement of the tie wire with the head. The guideways 13 and 14 are disposed upon one side of the head, as illustrated in Fig. 8 and a slot 15 is disposed in one side of the head, the object of which is to facilitate the removal of the device from the wires after the same have been tightened. Rotation is imparted to the head through the use of the crank 16 secured to the outer end of the spindle 9. Through the use of our device, we have found the necessity for the lateral end movement to the head during the tightening operation. To accomplish this result the spindle 17, as illustrated in Fig. 5, is in threaded relationship with the body portion 18 and as the spindle is rotated a lateral or end movement is imparted thereto, thus tightening the wire due to the twisting of the same and to impart an end movement to the spindle simultaneously. Vvhere smaller tie wires are in use in the lighter forms for construction, we have found that satisfactory results are obtained by the use of the head, as illustrated in Fig. 6, wherein the head portion 19 is disposed upon the inner end of the spindle 20. One or more notches 21 are disposed within one side of the head through which a tie wire 22 is made to pass. Where the wires are 1on the tie wire is made to pass through the inner of the notches 21, but where the same is comparatively short, the same may be made to engage within notch 23. Ribs 2st in the outer end of the head 25, have sharp engaging edges 26 and 27 that are made to engage with the tie wires to be tightened and the slipping of the same within the notch is prevented during the tightenmg process.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form of embodiment herein shown and described, as it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

What we claim is:

1. In a device of the class described, the combination of a body member having a longitudinal bearing disposed therein, and a plurality of feet longitudinally and horizontally spaced disposed upon and adjacent one end, a spindle journaled within the body member, a removable engaging head disposed upon one end of the spindle and a crank disposed upon the oppositely disposed end of the spindle.

2. In a device of the class described, the combination of a body member, feet disposed upon the inner end of the body member, a spindle disposed longitudinally of the body member, a crank disposed upon one end of the spindle and an engaging head disposed upon the other end, which head engages and disengages automatically by moving the device from a horizontal to a perpendicular position.

3. In a device of the class described, the combination of a body member having one or more feet disposed at one end of the body member, a spindle rotatably disposed longitudinally of the body member, a one piece engaging head associate-d with one end of the spindle, and means for automatically engaging and disengaging said head by moving the device through an angle.

4. In a device or" the class described, the combination or a body and foot element, a spindle rotatably journaled relative to the body element and a one piece engaging head disposed at one end of the spindle said head consisting of means for engaging with the tie wires for concrete forms and means permitting the disengagement from the tie wires. 5. In a device of the class described, the combination of a body element, a spindle disposed within a longitudinal bearing of the body element, and an automatic one piece engaging and disengaging head disposed upon one end of the spindle and a crank disposed upon the opposite end of the spindle.

ALBERT RUNDEN. CARL BRUMAN. 

